[font color=\'#000000\']Hi BK -
I'm a Portland local as well, and can second the advice given to you about the scenic opportunities in the Portland area. Like someone else mentioned, if you're short on time your best bet for photographic opportunity is the Columbia River Gorge, which lies just east of the Portland metro area.
Since the gorge is large, and so densely packed with waterfalls, the choices would be a bit overwhelming if you were to just drive there. Instead, I'll give you a specific trip/hike that I've found to have a good deal of photographic value, as well as not being overly packed with visitors (like Multnomah Falls is all summer long).
Take I-84 East out of Portland, past Gresham and Troutdale, until you get into the Gorge (about 1/2 hour from downtown). Resist the urge to take the Multnomah Falls exit (on your left) and keep driving. About 2 miles past Multnomah Falls is a the Historic Highway exit (it will have a reference to something about waterfalls), and then double back westbound parallel to I-84 just on the south side of the freeway. On the drive you'll see a couple visible falls, first is Horsetail Falls, immediately next to the road. Next is Oneonta Gorge, also very beautiful (and if you want, you can hike/wade upstream 1/2 mile all the way to the canyon's dead end where there's a nice little falls). Then you'll hit Multnomah Falls, which is absolutely beautiful (and about 500 feet tall), but is also extremely busy. Resist the urge to stop there, except maybe to have lunch in the restaurant, very nice but pricey.
The next falls to the west is called Wahkeena Falls, about 1/2 mile past Multnomah. It's probably the most striking of the roadside falls, and will be fairly busy (lots of photographers there, amerature and professional). Park there and shoot the lower portion of the falls until you're bored with it, then get ready to hike. Follow the path that starts uphill immediately to the west side (right side, if you're facing the falls) of the stream and little wooden bridge. You'll go uphill for about 1 mile, (~1000 vertical feet), and then the trail will break into a narrow gorge that parallels the stream. There's lots of gorgeous greenery and water along the way. After about a mile of this, you'll come to a couple small and photogenic falls, the nicer one of the two is called Fairy Falls.
After the hike back, (a lot easier downhill!) keep driving west on the historic highway. When the road forks, keep to the left and drive up to the top rim of the Gorge, past Crown Point (a nice tourist stop) and up to the top of the rim. Your goal should be to get to the outlook that is about 1 mile west of Crown Point, and slightly higher. As someone else mentioned, it's called the Women's Forum park (or something like that). It's a great location for a sunset shot looking at Crown Point and up the entire length of the Gorge (a very popular photo and a great way to end the day).
If all goes well and the light is right, you should go home with some very nice photos!
Enjoy!
Sheldon
[img]c:\Fairy Falls.jpg\" border=\"0\"]
Fairy Falls
[img]c:\Crown Point.jpg\" border=\"0\"]
View of Crown Point from the Womens Forum lookout[/font]